ceph/src/boost/libs/system/include/boost/system/api_config.hpp

   1 //  boost/system/api_config.hpp  -------------------------------------------------------//
   2
   3 //  Copyright Beman Dawes 2003, 2006, 2010
   4
   5 //  Distributed under the Boost Software License, Version 1.0.
   6 //  See http://www.boost.org/LICENSE_1_0.txt
   7
   8 //  See http://www.boost.org/libs/system for documentation.
   9
  10 //--------------------------------------------------------------------------------------//
  11
  12 //  Boost.System calls operating system API functions to implement system error category
  13 //  functions. Usually there is no question as to which API is to be used.
  14 //
  15 //  In the case of MinGW or Cygwin/MinGW, however, both POSIX and Windows API's are
  16 //  available. Chaos ensues if other code thinks one is in use when Boost.System was
  17 //  actually built with the other. This header centralizes the API choice and prevents
  18 //  user definition of API macros, thus elminating the possibility of mismatches and the
  19 //  need to test configurations with little or no practical value.
  20 //
  21
  22 //--------------------------------------------------------------------------------------//
  23
  24 #ifndef BOOST_SYSTEM_API_CONFIG_HPP
  25 #define BOOST_SYSTEM_API_CONFIG_HPP
  26
  27 # if defined(BOOST_POSIX_API) || defined(BOOST_WINDOWS_API)
  28 #   error user defined BOOST_POSIX_API or BOOST_WINDOWS_API not supported
  29 # endif
  30
  31 //  BOOST_POSIX_API or BOOST_WINDOWS_API specify which API to use
  32 //    Cygwin/MinGW does not predefine _WIN32.
  33 //    Standalone MinGW and all other known Windows compilers do predefine _WIN32
  34 //    Compilers that predefine _WIN32 or __MINGW32__ do so for Windows 64-bit builds too.
  35
  36 # if defined(_WIN32) || defined(__CYGWIN__) // Windows default, including MinGW and Cygwin
  37 #   define BOOST_WINDOWS_API
  38 # else
  39 #   define BOOST_POSIX_API
  40 # endif
  41
  42 #endif  // BOOST_SYSTEM_API_CONFIG_HPP